Mathcad comes with two Electronic Books, the MathSoft Desktop Reference and the MathSoft Electronic Book Sampler.
Great! Tell me more.
These show you the different books that MathSoft has to offer, as well as the wide range of capabilities of Mathcad.
Let's take a look at the MathSoft Electronic Book Sampler.
The Sampler gives you many Mathcad documents to read and experiment with. 
Whether your interest is Astronomy or Statistics, Engineering or Education, you'll find something of interest in the Sampler.
How can I navigate through the book?
This button takes you to the Table of Contents.
This button takes you to the Index.
You can double click on any underlined word to jump to that section of the Sampler.
This button moves you forward a page.
And this button moves you back a page.
Now you're ready to use live Mathcad! Try out your own ideas on the sample documents in the Sampler. 
Remember, all the variables and equations are live and can be modified. So click on the Next button to begin, and have fun!